80, gm of water at 30°C are poured on a large block of ice at 0°C. mass of ice that melts is

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10-1.Thermometry, Thermal Expansion and Calorimetry

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$80\, gm$ of water at $30°C$ are poured on a large block of ice at $0°C.$ The mass of ice that melts is ........ $gm$

A

$30$

B

$80$

C

$1600$

D

$150$

(AIPMT-1989)

Solution

(a) If $m$ $gm$ ice melts then

Heat lost $=$ Heat gain

$80 \times 1 \times (30 – 0) = m \times 80$ $\Rightarrow$ $m = 30\,gm$

Standard 11

Physics

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